Door lock



[Ia 175 21 a? 4/ 4a A. E. cHEsLER DOOR LOCK Filed May 23, 1941 2 Sheets-Sheet 1 INVENTOR Abrakamfifkesr ATTORNEYS Patented Dec. 1, 1942 UNITED STATE TENT OFFIQE 15' Claims.

As conducive to a clear understanding of the invention, it is noted that the conventional simple bathroom or communicating mortise lock, applicable to thin doors has a keyless dead bolt lock that cannot be manipulated from the outside of the door. The ordinary mortise cylinder lock is suitable only for relatively heavy doors 1% inches or more in thickness, since the cylinder element thereof extends into a lock case too thick to be accommodated within a relatively thin door. While a rim cylinder lock is applicable to thinner doors, it involves the installation of the bulky lock case over the inner face of the door, so that the structure is relatively ungainly, as distinguished from the finished trim of a mortise cylinder lock.

It is among the objects of the present invention to provide a cylinder lock of simple, inexpensive and rugged construction which, while it dispenses with the bulky attached lock case of the rim type of cylinder lock commonly used on thin doors, and affords a neat appearance or trim, is not limited in its applicability to the relatively heavy and thick outside doors, but finds ideal applicability to the relatively thin doors, ordinarily one inch or so in thickness, such as inside doors, screen doors and doors of small private homes and apartments, and admits the use of a lock face so narrow, as not to preclude the application of adequate weather stripping.

Another object is to provide a lock of the above type, utilizing lock elements of standard and well known inexpensive construction, and which incorporates in addition to the advantages of the conventional lock cylinder, the use of a turn bolt for looking or unlocking the dead bolt from the inside, independently of the key operation from the outside.

Another object is to provide a door lock which utilizes the compact cylinder of a conventional rim cylinder lock as the agency for operating a conventional bathroom or communicating lock, and without in anywise interfering with the normal use for which the communicating lock is intended.

Another object is to provide a lock of the above type involving a minimum number of subassemblies to be handled in the course of installation thereof, which may be readily assembled to the door, without the exercise of more than the ordinary skill of a carpenter, and which is proof against error in the assembly, the parts becoming inherently meshed or coordinated in the regular assembly thereof to the door.

Another object is to provide a compact flat transmission unit easily afiixed for establishing a driving connection between a rim lock cylinder and a mortise communicating or bathroom look.

In the accompanying drawings in which is shown one of various possible embodiments of the several features of the invention,

Fig. 1 is a perspective View showing a fragment of the outer face of the door with the lock installed,

Fig. 2 is a view similar to Fig. 1 showing the inner face of the door,

Fig. 3 is a transverse sectional view taken on line 33 of Fig. 1,

Fig. 4 is a transverse sectional view taken on line ll of Fig. 1,

Fig. 5 is a view in longitudinal cross-section taken on line 5-5 of Fig. 1,

Fig. 6 is a view in longitudinal cross-section taken on line 6-6 of Fig. 5, and

Fig. '7 is a front plan View of the transmission assembly connecting the cylinder and the communicating door lock.

Referring now to the drawings, the door Ill illustratively shown as a thin door such as an inner door, a screen door, or the like, has a front escutcheon plate I I, desirably of tray like construction with a rim I la pressed against the face of the door to which it is attached by screws I2. A conventional rim lock cylinder I3, the details of which need not be shown or described, since they are conventional, extends through a corresponding hole in and flush with the escutcheon plate I I, its rim I30. resting against a corresponding depressed flange I4 about said hole.

The cylinder I3 extends into circular hole I5 through the door and may be secured in place in any desirable manner. Preferably a U-bracket I6 whose out-turned ends I611 overlap the inner face of the door, serves as the anchor for the cylinder I3, a pair of screws I! through the U- bracket and threaded into lugs I8 of the cylind'er lock casing structure, drawing the latter tight against the door and the escutcheon plate II. Desirably a steel ring I9 is spun in place against flange I4, and serves to relieve the tray like plate II of buckling strain due to the thrust of the screws ll.

An escutcheon plate 2! similar to plate II is attached by screws 22 to the inner face of the door and mounts the turn bolt 23, the shank 24 of which is connected thereto by a cross pin 25 and extends into the relatively flat casing 26 of the conventional bathroom or communicating lock which is mortised into the door. The shaft 2'! connecting the door knobs 28 extends through said communicating lock and through a conventional hub 29 thereabout serving to operate the latch 30 which protrudes through the usual aperture in the face plate 3| which trims the edge of the door. The conventional dead bolt 32 in the communicating lock casing is operated by turning the wing or finger piece 33 of the turn bolt 23 which transmits its torque by way of shank 24 and hub 35.

A transmission from the cylinder |3 to the turn bolt 23 of the communicating lock is disposed between the inner escutcheon plate 21 and the door ID. This transmission is desirably built as a fiat unit, and comprises a steel plate 36 resting at its upper and lower flanges 37 and 38 respectively against the inner face of the inside escutcheon plate 2|, with the intervening length of said plate spaced from the escutcheon plate to aiford a case 39 for the transmission. The transmission plate is desirably riveted as at 40 to the escutcheon plate 2| by turning over the rims of the holes in the latter which accommodate a pair of adjacent screws 22. Desirably inturned tongues 49 from the plate 36 serve to maintain the proper and accurate spacing of the main area of said plate from the associated escutcheon plate 2|.

The conventional operating bar 4| extends from. the rim lock cylinder |3 past the inner face of the door into a transverse slot 42 in a hub 43 having a bearing mount in the transmission plate 36. Hub 43 mounts a segmental gear plate 44 which is keyed thereto. A bearing bushing 45 encircling the turn bolt and affixed thereto by the cross pin 25 is likewise mounted for rotary movement thereof in the transmission plate. Said hub mounts a segmental gear plate 36 rigidly affixed thereto and lying in the same plane as the segmental gear plate 44 for meshing therewith. Desirably segmental gear plate 44 has only one pair of rounded teeth 41 extending at an angle of approximately 60 degrees with respect to each other. Segmental gear 46 desirably has a single gear tooth 48 adapted to mesh between the two teeth 41 of segmental gear 44, when the latter is turned, so that by operating the cylinder by its key (not shown) gear plate 44 will drive gear plate 46 and rotate the turn bolt 23 for moving the dead bolt 32 to open or closed position as the case may be. The clearance laterally of the tooth 48 on gear plate 46 is the usual clearance between consecutive teeth. The latch plate 36 has a stop 50 struck up therefrom, which serves to limit the movement of the gear plate 46 by contact of its straight edge 46a therewith, so as to prevent reverse turning of the driving segment gear plate 44 before installation thereof.

Desirably a hairpin spring is aifixed to the under face of the transmission plate, being anchored by screw 52 through the median loop 53 of said spring. The legs of spring 5| are afilxed by struck up tongues 54 in the plate 36 and straddle the bearing bushing 45 which latter has a square flange 55 desirably rounded at its vertices 55a. thereby to assist resiliently in completing the stroke of the dead bolt to open or closed position as the case may be.

The shaft 24 of the latch bolt is desirably square in cross-section as shown with only one of its edges 24a thereof flattened off and the corresponding dead bolt operating hub 35 in the communicating lock casing 26 is correspondingly conformed to effect the positioning of the finger portion 33 of said turn bolt in vertical position as shown, when the dead bolt 32 is withdrawn.

Desirably also one of the legs of the hairpin spring has an upward extension 56 (or if desired both legs have such extensions), to lodge against corresponding fiat or flats 51 on the hub 43 in order to position the latter with its cross slot 42 horizontal, to accommodate the end of the operating bar 4| which extends horizontally when the cylinder I3 is unlocked.

The installation of the lock is effected with ease. The door is equipped with the transverse hole 58 for the door knob shaft 21, with a transverse hole |5 for the cylinder, with the mortise 59 for the communicating lock and with the socket 66 for the turn bolt of the communicating lock 26. The front escutcheon plate H is screwed to the door in proper relation, the cylinder I3 is set into said plate, the U-bracket I6 is applied and the screws tightened and the communicating lock 26 is installed into the mortise 59. ead bolt 32 of the communicating door lock being withdrawn and the cylinder open so that the widthof the operating bar 4| thereof extends horizontally, the inner escutcheon plate 2| is now positioned, the width of the slot 42 in hub 43 being kept horizontal by hairpin spring extension 56. The parts will thus enter into immediate registry as the rear escutcheon plate 2| is positioned, the shaft 24 of the turn bolt entering the hub 35 in the communicating lock and the transverse slot 42 of the hub 43 passing over the end of the operating bar 4| of the lock cylinder. The screws 22 are now applied to complete the installation of the inner escutcheon plate and upon affixing the door knobs 28 to the end of the shaft 21 the assembly is complete.

The operation will now be briefly summarized. When the door is to be locked from the outside, the operating bar All is turned by the key (not shown) and rotates the hub 43 and with it the toothed gear segment 44 which enters into mesh with gear segment 46 and then turns the latter. Spring 5| is thereby stressed, as is the conventional spring (not shown) in the communicating lock, so that the dead bolt 32 is thrown the rest of the way by the release of said springs. The square flange 55 in cooperation with spring 5| aids resiliently to retain the dead bolt in position. The spring 5| by its coaction with square flange 55 prevents back lash of the turn bolt 23 and thus prevents shifting of gear plate 46 out of proper registry with respect to gear plate 44. In each operation, the turn bolt 23 with its associated shaft 24 is thus rotated through approximately degrees to throw and lock the dead bolt 32.

The construction of the conventional cylinder is such that the key must be rotated through substantially a complete turn before it can be removed from the cylinder. The key when thus turned for removal will first have rotated the gear plate 44 to the position shown in Fig. '7 in which its teeth 47 extend generally upward, out of the range of operation of the gear plate 46,

and will be resiliently held in such upward position by the pressure of hairpin spring extension 56 against fiat 51. It follows therefore that the turn bolt 23 may be rotated freely to open the dead bolt or to reclose it 'as desired, by turning through approximately the 90 degree angle in either direction without interference from the cylinder l3 or the upwardly extending unmeshed gear teeth 41.

The locked door may be readily opened by inserting and turning the key, in which operation the. teeth 41 will first be brought into mesh with and then turn the segment gear plate 46 to unlock the door.

It will be seen that the cylinder and the mortise lock are disposed on the door out of contact with each other. The communicating lock is mortised into the door which may, therefore, be of thin construction. Only the relatively flat transmission unit which connectsthe cylinder to the communicating lock extends beyond the face of the door, and that is lodged and concealed within the tray-shaped escutcheon plate 2|. The face 3! of the lock in practice is inch wide or may be even less, and thus affords a margin on a door 11/ inch thick of at least inch on each side of the face, which is adequate for weather stripping.

While the escutcheon plates are desirably of the shape shown, it will be understood that they may be made of difi'erent shapes and that the escutcheon plate on the outside of the door may be of two elements, one for the cylinder l3 and one for the door knob, and the escutcheon plate on the inside may be similarly divided, one for.

the turn bolt and one for the door knob.

As many changes could be made in the above construction, and many apparently widely dif ferent embodiments of this invention could be made without departing from the scope of the claims, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A door lock, comprising the combination of a mortise communicating lock having a turn bolt, a rim lock cylinder and a transmission for operating said turn bolt from the cylinder, said transmission including a pair of meshing segmental toothed plates, each having a fixed axis, one rigid with said turn bolt and the other directly driven from the cylinder, said segmental gear plates being interrelated 'topermit drive of the turn bolt from the cylinder look but to preclude reverse drive of the cylinder lock from the turn bolt when the latter is in completely open or in completely closed setting.

2. A door lock comprising the combination of a communicating lock having a turn bolt, a rim lock cylinder and a transmission unit to transmit torque from said cylinder to the turn bolt of said communicating lock, the transmission of said unit being interrupted both in locked and unlocked position of the communicating look when the key of the cylinder lock is removed, to'permit operation of the turn bolt independently of said cylinder lock both from locked and unlocked position of the latter, said door lock being effective to operate the turn bolt from the cylinder lock both for locking and unlocking the door.

3. A door lock comprising a communicating lock, including a turn bolt, a rim look cylinder near said communicating lock having an operating bar extending from the rear thereof and a transmission between said cylinder and said communicating lock, said transmission including a plate carrying a pair of intermeshing segmental gears, a hub mounting one of said gears and in operative coaction with said operating bar of the cylinder lock, the other of said segmental gears being rigid and coaxial with said turnlbolt, said first segmental gear being so coordinated with the cylinder that its teeth clear those of the gear 0n the turn bolt when the key isremoved from the cylinder.

4. A door lock comprising a communicating 1 look unit adapted to be mortised in a door and having a turn bolt, a rim lock cylinder to be a mounting plate having a pair of hubs therethrough, one of said hubs accommodating the end of said operating bar and the other being telescoped and keyed over the stem of said turn bolt, and a pair of segmental gear plates mounted in a common plane upon the respective hubs to permit locking and unlocking the turn bolt of said communicating lock from the cylinder, the cylinder being so correlated with the segmental gear plate upon the corresponding hub that the teeth of the latter are clear of the coacting segmental gear plate when the key is removed from the cylinder lock, thereby to permit operation of the communicating lock independently of the cylinder lock.

5. In a door lock, escutcheon plate means for one side of a door and serving to accommodate a door knob and the turn bolt of a communicating lock having a dead bolt at all times under control thereof, said means having mounted with respect thereto, parallel therewith, and surrounding the shank of said turn bolta segmental gear plate keyed to the latter and carrying also a hub spaced from said segmental gear, said hub having thereon a second segmental gear plate adapted to mesh with the gear plate upon said turn bolt shaft and being conformed to be turned from the cylinder of a rim cylinder lock.

6. .In a door lock, that has escutcheon plate means adapted to accommodate a door knob therethrough and also a turn bolt therethrough, the latter for the operation of a communicating lock to be mortised into the door; the combination therewith of a transmission unit for operating said turn bolt from the cylinder of a rim cylinder lock, said unit comprising a plate mounted in face-to-face relation at its opposite ends with the underside of said escutcheon means, and a pair of coacting gear plates lodged in the space between said escutcheon means and said transmission plate, hubs mounting the respective gear plates and bearing in said transmission plate, one of said hubs being keyed with respect to the turn bolt and the other being adapted for coaction with such cylinder.

7. A door lock comprising .a pair of escutcheon plates to be mounted at opposite faces of a door and having door knobs protruding therefrom, the cylinder of a rim cylinder lock mounted within one of said escutcheon plates and adapted to be clamped in position therein from the opposite face of the door and having an operating .bar protruding from the rear thereof and a transmission near the latter face of said door for operating a communicating lock from the cylinder lock, said transmission comprising a transmission plate afiixed to the escutcheon plate that accommodates the turn bolt, .said transmission plate having a pair of coacting segmental gear plates, hubs mounting the respective gear plates, one of said hubs being keyed to said turn bolt and the other beingkeyed with respect to the operating bar of the cylinder, the teeth of the latter segmental gear :plate being so correlated with the cylinder as .to :beclear of the operation of the coacting segmental gear plate when the key is removed.

8. As an article of manufacture, an escutcheon plate assembly having an associated transmission to connect the cylinder of a rim cylinder lock to a communicating lock, said escutcheon plate having a turn bolt for the communicating lock, extending therethrough, a segmental gear keyed to said turn bolt and adjacent said escutcheon plate, a hub carried by said escutcheon plate for accommodating the operating bar of said cylinder, a segmental gear plate keyed to said hub for meshing with said first segmental gear plate to permit operation of the turn bolt from the cylinder, the gear teeth on said hub being so correlated with the cylinder as to be clear of the path of movement of said turn bolt gear plate when the door is completely locked or unlocked.

9. As an article of manufacture, an escutcheon plate assemblage having an associated transmission to connect the cylinder of a rim cylinder lock to a communicating lock, said escutcheon plate having a turn bolt for the communicating lock, a segmental gear plate keyed to said turn bolt and adjacent said escutcheon plate, a hub carried by said escutcheon plate for accommodating the end of the operating bar of such cylinder, a segmental gear plate keyed to said hub for meshing with said first segmental gear plate to permit operation of the turn bolt from the cylinder, the teeth of the gear plate on said hub being so correlated with the cylinder as to be normally clear of the path of movement of said turn bolt gear plate, the turn bolt having a rectangular flange thereon, a hairpin spring straddling said flange, resiliently to determine the positions of the lock, and stop pieces for the turn bolt gear plate to limit reverse displacement of said turn bolt before installation.

10. As an article of manufacture, a transmission unit to permit the operation of a communicating lock from the cylinder of a rim cylinder lock, said transmission unit comprising a mounting plate having a pair of hubs bearing therein, the turn bolt of the communicating lock having its shank keyed in one of said hubs, the other hub having a transverse slot for accommodating the extremity of the operating bar of the cylinder, a pair of segmental gear plates rigidly afiixed to and concentric with the respective hubs, said gear plates having coacting teeth to permit operation of the communicating lock from the cylinder, the segmental gear plate on the hub for said cylinder having its teeth out of the range of operation of the coacting segmental plate, except during effective operation of the cylinder.

11. As an article of manufacture an escutcheon tray with its rim to face the door, a transmission plate having ledges at its upper and lower ends in contact with the under face of said tray and permanently aflixed thereto, the intervening length of said transmission plate being spaced from said tray to form a gear plate case, a pair of intermeshing segmental gears in said case, each of said gears having a hub rigid therewith, said hubs being rotatably mounted in said transmission plate, one of said hubs having the shank of the turn bolt of a communicating lock keyed therein, the other of said hubs being slotted for accommodating the extremity of the operating bar of the cylinder of a rim cylinder lock, the segmental gears being constructed and arranged for operation of the turn bolt at all times from the slotted hub, but normally to preclude reverse operation of the slotted hub from the turn bolt.

12. In apparatus of the character described, a door having opposite escutcheon trays with their rims against the door, door knobs therethrough;

the cylinder of a rim cylinder lock flush with one of said trays extending into a corresponding aperture through the door, means extending from the opposite face of said door and clamping said cylinder in place, a communicating lock mortised in the door and having its turn bolt extending through the other escutcheon tray, said latter escutcheon tray having transmission means therein between the cylinder and the communicating lock, said transmission means comprising.

a pair of intermeshing segmental gear plates, bearing hubs for the respective gear plates, one of said gear plates being rigid with said turn bolt, the other being keyed with respect to said cylinder for rotation thereby.

13. A door lock comprising a communicating lock with a turn bolt having a finger piece at one side of the door, the cylinder of a substantially rim cylinder look at the other side of the door and having a rearwardly extending operating bar, transmission means from said cylinder to said communicating lock including a segmental gear operated from the cylinder and having a mounting hub coaxial with said cylinder and a coacting segmental gear coaxial and rigid with the turn bolt, the shank of the turn bolt being uniquely coordinated with the communicating lock for the finger piece thereof to extend in upright direction when the lock is open, the width of the operating bar extending horizontally when the cylinder is in open position, for the end of slaigl bar to be keyed into a horizontal slot in said 14. A dOOr lock comprising the cylinder of a rim cylinder lock adapted to be introduced from the outer side of the bore in a door, a communicating lock clear of said cylinder, adapted to be introduced into a mortise in said door and having a turn bolt to be accessible from the inner face of the door and a dead bolt at all times under control thereof, and a transmission assemblage interposed between said cylinder and said communicating lock, said transmission assemblage being operated from a rearwardly extending operating bar in the cylinder and means extending in a vertical plane along the rear face of said door, transmitting torque from said operating bar to said turn bolt for operating the dead bolt of the communicating lock from the cylinder. 15, In a door look, a transmission unit for de-( livermg torque from the cylinder of a rim cylin-.

der lock to the turn bolt of an associated communicating lock, said transmission unit including a plate having a pair of hubs therethrough rotatably mounted therein, with segmental gear plates fixedly carried by said hubs and lodged in a common plane, one of said hubs having a transverse slot for accommodating the end of the operating bar of the cylinder, the other hub accommodating the turn bolt and its shank, and means for maintaining said hubs positioned for ready coaction with the lock units to be connected thereby, said means comprising a spring mounted on the transmission plate, said hubs having rectilinear portions against which said spring presses for determining the rotary position of said hubs in installation of said unit with respect to the previously installed cylinder and communicating lock uni s.

ABRAHAM E. CHESLER. 

